Hyatt is offering 10% off of gift cards and check certificates with the code GPGIFT15. The code can be applied when purchasing these items directly on their website and expires on November 24.
Gift Checks vs. Gift Cards
While we often see discounts on eBay and elsewhere on Hyatt Gift Cards, those are only able to be used in the U.S., Canada and the Caribbean. Hyatt check certificates are valid worldwide and thus have more widespread uses.
American Express OPEN 5%
In addition to the 10% off, if you use an American Express business card then you will receive a 5% rebate from American Express OPEN. (Note: This benefit is going away on January 1, 2016.)
13.36% Off Face Value
Since there are shipping charges and the 5% discount is calculated on what you actually pay, this doesn’t work out to be a 15% discount. For example, after paying shipping and receiving the 5% OPEN rebate, the cost of a $500 check certificate is $433.20. That represents a 13.36% discount off of face value. The discount percentage will vary depending on what denomination you purchase.
HT: Travel Codex